Towel bar



FIG. 1 is a front view of a towel bar showing our new design;

FIG. 2 is a top view of FIG. 1, the bottom view being a mirror image thereof;

FIG. 3 is a right side view of FIG. 1, the left side view being a mirror image thereof; and,

FIG. 4 is a rear view thereof. 

The ornamental design for a towel bar, as shown and described. 